EMC2303-1-KP-TR Microchip

EMC2301/2/3/5 Single/Multiple RPM-Based PWM Fan Controller Features Package Types Up To Five Programmable Fan Control Circuits: - 4-wire fan compatible EMC2301 (MSOP-8) SMDATA 1 8 ALERT - High-speed PWM (26 kHz) SMCLK 2 7 CLK - Low-speed PWM (9.5 Hz-2240 Hz) V 3 6 TACH DD PWM GND 4 5 - Optional detection of aging fans - Fan Spin Up Control and Ramp Rate Control EMC2302 (MSOP-10) 1 10 SMDATA ALERT - Alert on Fan Stall SMCLK 2 9 CLK - Up to three selectable default fan speeds for 3 8 V TACH2 DD the EMC2303/5 4 7 PWM2 GND Watchdog Timer 5 6 PWM1 TACH1 RPM-Based Fan Control Algorithm: - 0.5% accuracy from 500 RPM to 16k RPM EMC2303 (4 x 4 mmQFN-12) (external crystal oscillator) - 1% accuracy from 500 RPM to 16k RPM (internal clock) SMDATA 1 9 CLK SMBus 2.0 Compliant: SMCLK 2 EP13 8 TACH2 - Up to 6 selectable SMBus addresses for the VDD 3 7 PWM2 EMC2303/5 - SMBus Alert compatible CLK Pin Can Provide a Clock Source Output EMC2301 Available in an 8-Pin MSOP Lead-Free RoHS Compliant Package EMC2305 (4 x 4 mm QFN-16) EMC2302 Available in a 10-Pin MSOP Lead-Free RoHS Compliant Package EMC2303 Available in a 12-Pin 4 mm x 4 mm SMDATA 1 12 ALERT QFN Lead-Free RoHS Compliant Package SMCLK 2 11 CLK EP17 V 3 10 TACH3 DD EMC2305 Available in a 16-Pin 4 mm x 4 mm ADDR SEL 4 9 PWM3 QFN Lead-Free RoHS Compliant Package General Description The EMC2301/2/3/5 family is an SMBus compliant fan * Includes Exposed Thermal Pad (see Table 3-1). controller with up to five independently controlled PWM fan drivers. Each fan driver is controlled by a program- Device Features mable frequency PWM driver and Fan Speed Control algorithm that operates in either a closed loop fashion or as a directly PWM-controlled device. Default PWM Fan SMBus Start-Up Each closed loop Fan Speed Control (FSC) algorithm Device Control Address RPM has the capability to detect aging fans and alert the sys- Channels Select tem. It will likewise detect stalled or locked fans and trigger an interrupt. EMC2301 1 Fixed No Additionally, the EMC2301/2/3/5 devices offer a clock EMC2302 2 Fixed No output so that multiple devices may be chained as cli- EMC2303 3 6 Selectable Yes ents to the same clock source for optimal performance EMC2305 5 6 Selectable Yes in large distributed systems. 2021 Microchip Technology Inc. DS20006532A-page 1 5 16 PWM1 TACH5 4 12 6 15 ADDR SEL TACH3 TACH1 PWM5 PWM1 5 11 7 14 PWM3 PWM2 TACH4 TACH1 6 10 TACH2 8 13 PWM4 ALERTEMC2301/2/3/5 Applications Servers Projectors Industrial and Networking Equipment Notebook Computers Block Diagram CLK (EMC2301/2/3/5) TACH1 (EMC2302/3/5) TACH2 ADDR SEL (EMC2303/5) Tach Tachometer Measurement Limit Registers SMBus (EMC2305)TACH5 SMCLK (EMC2301/2/3/5) PWM1 Fan Speed Control Algorithm SMDATA Protocol (EMC2302/3/5) PWM2 Fan Speed Control Algorithm ALERT PWM Drivers (EMC2305)PWM5 Fan Speed Control Algorithm DS20006532A-page 2 2021 Microchip Technology Inc. &OLHQW